MIT licensed and maintained by Nikita Volkov
This version can be pinned in stack with:contravariant-extras-0.3@sha256:d799366b49a76dbd6a0099b179b351c2587837e4d2eb0f43b9912c93923b52f1,1669
Used by 1 package in nightly-2016-02-04(full list with versions):